塑料科技2026，Vol.54Issue(4)：49-54,6.DOI:10.15925/j.cnki.issn1005-3360.2026.04.009
PVDF/SiO2@BST82电介质复合材料介电性能的研究
Study on Dielectric Properties of PVDF/SiO2@BST82 Dielectric Composites
摘要
Abstract
Using poly(vinylidene fluoride)(PVDF)as the matrix and SiO2-coated barium strontium(SiO2@BST82)core-shell structured inorganic nanoparticles as the filler,PVDF/SiO2@BST82 dielectric composite films with different mixing ratios were prepared via the spin coating method.The influence of SiO2@BST82 filler volume fraction on the phase structure and dielectric breakdown performance of the composite films was investigated.X-ray diffraction patterns confirmed the successful preparation of SiO2@BST82 inorganic nanoparticles,and the incorporation of these fillers inhibited the crystallization of the PVDF matrix.The dielectric constant of the composite films increased with rising filler content.However,when the filler volume fraction exceeded 5%,the introduction of interfaces generated numerous micro-defects,leading to increased dielectric loss.The addition of SiO2@BST82 fillers caused a decreasing trend in the breakdown field strength of the composites.In the PVDF/SiO2@BST82 composite system,peaks and valleys emerged in the dielectric constant temperature spectra as the filler volume fraction increased.At a SiO2@BST82 filler volume fraction of 3%,the composite film exhibited favorable dielectric temperature stability,and its breakdown field strength decreased to a lesser extent compared to composite films with other filler loadings,demonstrating overall superior performance.The dielectric constant,dielectric loss,and breakdown field strength of the composite film measured at room temperature and 100 Hz were 10.490,0.037,and 141.550 MV/m,respectively.An optimized ratio enhanced the dielectric properties,breakdown performance,and temperature stability of PVDF-based composite films.The study results provided guidance for the preparation of high-performance dielectric composite films.关键词
电介质薄膜/介电性能/温度依赖性/频率依赖性/击穿场强Key words
Dielectric film/Dielectric properties/Temperature dependence/Frequency dependence/Breakdown field strength分类
信息技术与安全科学引用本文复制引用
田雅馨,莫军琪,同阳,刘嘉辰..PVDF/SiO2@BST82电介质复合材料介电性能的研究[J].塑料科技,2026,54(4):49-54,6.基金项目
浙江省教育厅一般科研项目(Y202456469) （Y202456469）
山西省重点研发计划项目(202402150101009) （202402150101009）
山西省回国留学人员科研资助项目(2023-153) （2023-153）
